Geometry Symbols

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Across
  1. 3. ∥
  2. 8. line from point A to point B
  3. 10. formed by two rays
  4. 11. arcsecond, 1′ = 60″
  5. 12. line that start from point A
  6. 14. Δ
  7. 15. ⊥
Down
  1. 1. 1 turn = 360deg
  2. 2. an angle of exactly 90°
  3. 4. infinite line
  4. 5. equivalence of geometric shapes and size
  5. 6. |x-y|/ distance between points x and y
  6. 7. same shapes, not same size/ ~
  7. 9. π
  8. 13. 1° = 60′